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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

Administrative data

Endpoint:
melting point/freezing point
Type of information:
experimental study
Adequacy of study:
key study
Study period:
2004
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: Basic data given: comparable to guidelines/standards

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2004
Report date:
2004

Materials and methods

Principles of method if other than guideline:
Differential thermal analysis (DTA)
Type of method:
thermal analysis
Remarks:
(DTA)

Test material

Constituent 1
Chemical structure
Reference substance name:
2-[(4-chloro-2-nitrophenyl)azo]-N-(2-chlorophenyl)-3-oxobutyramide
EC Number:
229-355-1
EC Name:
2-[(4-chloro-2-nitrophenyl)azo]-N-(2-chlorophenyl)-3-oxobutyramide
Cas Number:
6486-23-3
Molecular formula:
C16H12Cl2N4O4
IUPAC Name:
2-[(4-chloro-2-nitrophenyl)diazenyl]-N-(2-chlorophenyl)-3-oxobutanamide
Test material form:
solid: nanoform, no surface treatment

Results and discussion

Melting / freezing point
Key result
Melting / freezing pt.:
255 °C
Decomposition:
yes
Decomp. temp.:
259 °C

Any other information on results incl. tables

The DTA shows an endothermal reaction with an onset at 255.24 °C (rounded value of 255 °C taken as melting point) and a peak at 255.94 °C.

Decomposition starts from the melting substance. The (exothermal) decomposition reaction shows an onset at 258.98 °C (rounded value of 259 °C taken as decomposition temperature) and a peak at 289.99 °C, the reaction energy of the decomposition being 1146 J/g.

Almost identical values were obtained in a DTA with an open cup (under 20 bar air)

Applicant's summary and conclusion

Conclusions:
Decomposition starts from the melting substance, with a melting point of 255 °C and a decomposition temperature of 259 °C.
Executive summary:

The DTA shows decomposition from the melting substance starting at 259 °C with a melting point of 255 °C.